
Bell Plain township
- County:
- Marshall County
- County Seat:
- No
- Area (mi²):
- 36.793
- State:
- Illinois
Bell Plain township is located in Marshall County, Illinois. Bell Plain township has a 2025 population of 320. Bell Plain township is currently growing at a rate of 0.31% annually and its population has increased by 0.63% since the most recent census, which recorded a population of 318 in 2020.
The average household income in Bell Plain township is $71,049 with a poverty rate of 4.89%. The median age in Bell Plain township is 55.3 years: 53.4 years for males, and 57.1 years for females.